var on;
function showDiv(el,colour){
	var d = document.getElementById('submenu_'+el.id);
	if(d != on){
		if(on){
			on.style.display = 'none';
		}

		if(d){
			d.style.display = 'block';
			
		}on = d;
	}
}
function resetMenu(){
	if(on){
		on.style.display = 'none';
		on = '';
	}
}

function checkSubmit() {
	var verplicht= Array("naam","straat","postcode","plaats","telefoon","email");
	var formfield ="";
	for (i=0;i<verplicht.length;i++) {
		formfield = eval("document.forms[0]."+verplicht[i]);
		if (formfield.value == "") {
			alert (verplicht[i]+ " is een verplicht veld");
			formfield.focus();
			return false;
		}
	}
	formfield = eval("document.forms[0].email");
	var result1 = formfield.value.match(/\./);
	var result2 = formfield.value.match(/@/);
	if ((result1 == null) || (result2 == null)) {
		alert ("foutief emailadres");
		formfield.focus();
		return false;
	} else {
		return true;
	}
}